NATAZIA (estradiol valerate and estradiol valerate/dienogest tablets). Accessed December 27, 2015 from: http://labeling.bayerhealthcare.com/html/products/pi/natazia_pi.pdf
Estradiol Valerate and Estradiol Valerate/Dienogest. DRUGDEX System. 2015 Truven Health Analytics, Inc. Accessed December 27, 2015 from http://thomsonhc.com.